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Make intel_hex_line a generator instead of passing in filehandle

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This commit is contained in:
Paul Jimenez
2019-02-23 01:55:02 -05:00
parent 609354b857
commit 576f7a91f2
1 changed files with 22 additions and 23 deletions
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43
Bootup Logo/python_logo_converter/img2ts100.py
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@@ -32,29 +32,32 @@ def split16(word):
return (word >> 8) & 0xff, word & 0xff
def intel_hex_line(file, record_type, offset, data):
"""write a line of data in Intel hex format"""
def intel_hex_line(record_type, offset, data):
"""generate a line of data in Intel hex format"""
# length, address offset, record type
record_length = len(data)
file.write(':{:02X}{:04X}{:02X}'.format(record_length, offset, record_type))
yield ':{:02X}{:04X}{:02X}'.format(record_length, offset, record_type)
# data
map(lambda byte: file.write("{:02X}".format(byte)), data)
for byte in data:
yield "{:02X}".format(byte)
# compute and write checksum (with DOS line ending for compatibility/safety)
file.write("{:02X}\r\n"
.format((((sum(data, # sum data ...
record_length # ... and other ...
+ sum(split16(offset)) # ... fields ...
+ record_type) # ... on line
& 0xff) # low 8 bits
^ 0xff) # two's ...
+ 1) # ... complement
& 0xff)) # low 8 bits
yield "{:02X}\r\n".format((((sum(data, # sum data ...
record_length # ... and other ...
+ sum(split16(offset)) # ... fields ...
+ record_type) # ... on line
& 0xff) # low 8 bits
^ 0xff) # two's ...
+ 1) # ... complement
& 0xff) # low 8 bits
def intel_hex(file, bytes_, start_address=0x0):
"""write block of data in Intel hex format"""
def write(generator):
file.write(''.join(generator))
if len(bytes_) % INTELHEX_BYTES_PER_LINE != 0:
raise ValueError("Program error: Size of LCD data is not evenly divisible by {}"
.format(INTELHEX_BYTES_PER_LINE))
@@ -62,25 +65,21 @@ def intel_hex(file, bytes_, start_address=0x0):
address_lo = start_address & 0xffff
address_hi = (start_address >> 16) & 0xffff
intel_hex_line(file,
INTELHEX_EXTENDED_LINEAR_ADDRESS_RECORD,
0,
split16(address_hi))
write(intel_hex_line(INTELHEX_EXTENDED_LINEAR_ADDRESS_RECORD, 0,
split16(address_hi)))
size_written = 0
while size_written < INTELHEX_MINIMUM_SIZE:
offset = address_lo
for line_start in range(0, len(bytes_), INTELHEX_BYTES_PER_LINE):
intel_hex_line(file,
INTELHEX_DATA_RECORD,
offset,
bytes_[line_start:line_start + INTELHEX_BYTES_PER_LINE])
write(intel_hex_line(INTELHEX_DATA_RECORD, offset,
bytes_[line_start:line_start + INTELHEX_BYTES_PER_LINE]))
size_written += INTELHEX_BYTES_PER_LINE
if size_written >= INTELHEX_MINIMUM_SIZE:
break
offset += INTELHEX_BYTES_PER_LINE
intel_hex_line(file, INTELHEX_END_OF_FILE_RECORD, 0, ())
write(intel_hex_line(INTELHEX_END_OF_FILE_RECORD, 0, ()))
def img2hex(input_filename,